Paper 2015/246 Original: eprint.iacr.org/2015/246 ↗
Implicit Zero-Knowledge Arguments and Applications to the Malicious Setting
Abstract
We introduce \emph{implicit zero-knowledge} arguments (iZK) and simulation-sound variants thereof (SSiZK); these are lightweight alternatives to zero-knowledge arguments for enforcing semi-honest behavior. Our main technical contribution is a construction of efficient two-flow iZK and SSiZK protocols for a large class of languages under the (plain) DDH assumption in cyclic groups in the common reference string model. As an application of iZK, we improve upon the round-efficiency of existing protocols for securely computing inner product under the DDH assumption. This new protocol in turn provides privacy-preserving biometric authentication with lower latency.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2016-12-23: last updated
- 2015-03-19: published
- Short URL
- https://ia.cr/2015/246
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2015/246,
author = {Fabrice Benhamouda and Geoffroy Couteau and David Pointcheval and Hoeteck Wee},
title = {Implicit Zero-Knowledge Arguments and Applications to the Malicious Setting},
howpublished = {Cryptology {ePrint} Archive, Paper 2015/246},
year = {2015},
url = {https://eprint.iacr.org/2015/246}
}